﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Example12_CSharp
{
    class Polygon
    {
        protected int width,height;
        public void setValues(int a,int b)
        {
            width=a;height=b;
        }
    class Rectangle:Polygon
    {
        public int area()
        {
            return(width*height);
        }
    class Triangle:Polygon
    {
        public int area()
        {
            return(width*height/2);
        }
    class Program12
    {
        static void Main(string[] args)
        {
            Rectangle rect=new Rectangle();
            Triangle trgl=new Triangle();
            rect.setValues(4,5);
            trgl.setValues(4,5);
            Console.WriteLine("recta:{0}",recta.area());
            Console.WriteLine("trglb:{0}",trgl.area());
        }
    }
    

